RC
Ruth Cook — 1940 US Census Record
Model Tree available1940 United States Federal Census · Loudoun-County, Virginia
Our Model Tree links this Ruth Cook across the 1920, 1930 and 1940 US Censuses in Loudoun-County, Virginia (XGBoost, ~Confirmed), with identified parents Carl & Cary — first a daughter (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Female
Daughter
Born: Virginia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Loudoun-County, Virginia |
| Surname | Cook |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Virginia |
| 1935 Residence (City) | Middleburg |
| 1935 Residence (County) | Loudoun |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Township / Ward | Middleburg |
| Est. Birth Year | ~1915 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ruth | Age | Birth yr |
|---|---|---|---|---|
| Carl Cook | Head | — | 52 | ~1888 |
| Laura Cook | Daughter | — | 27 | ~1913 |
| Carl Cook | Son | — | 19 | ~1921 |
| Ruth Cook | Daughter | — | 25 | ~1915 |
| Birdie Cook | Spouse | — | 47 | ~1893 |
| Nancy Cook | Daughter | — | 22 | ~1918 |
Census Appearances
1920
Loudoun, Virginia
Daughter, age 4
Loudoun, Virginia · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Ruth |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | none |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1930
Loudoun, Virginia
Daughter, age 15
Loudoun, Virginia · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Ruth A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Can Read/Write | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1940
Loudoun-County, Virginia
Daughter, age 25
Loudoun-County, Virginia · implied b. ~1915 — 6 household members
| Surname | Cook |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Virginia |
| 1935 Residence (City) | Middleburg |
| 1935 Residence (County) | Loudoun |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Ruth Cook across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Carl Cook (~0.92 confidence) and father Cary Cook (~0.92 confidence) and father John Cook (~0.92 confidence) and mother Birdie Cook (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Carl Cook
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Cary Cook
b. ~1888
Source father
● Household
· direct · ~0.92
Father
John Cook
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Birdie Cook
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ruth Cook
Daughter · 1940 · age 25 · b. ~1915 · Virginia
★ You are viewing this record
Sibling
Nancy Cook
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carl Cook
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Laura Cook
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Loudoun-County, Virginia
Open full size
1940 US Federal Census — Loudoun-County, Virginia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04274-00390)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Carl P. Cook | 52 | Head | Tin Smith | Virginia |
| 2 | Birdie Cook | 47 | Wife | — | Virginia |
| 3 | Laura Cook | 27 | Daughter | Seamstress | Virginia |
| 4 | Ruth Cook THIS PERSON | 25 | Daughter | — | Virginia |
| 5 | Nancy Cook | 22 | Daughter | Proprietor | Virginia |
| 6 | Carl P. Cook | 19 | Son | — | Virginia |
| 7 | Carlton Rockefeller | 31 | Head | Truck Driver | Virginia |
| 8 | Anita L. Rockefeller | 31 | Wife | — | Virginia |
| 9 | Carlton Rockefeller | 9 | Son | — | Virginia |
| 10 | Margaret A. Rockefeller | 6 | Daughter | — | Virginia |
| 11 | Henry M. Moore | 60 | Head | Carpenter | Virginia |
| 12 | Nannie D. Moore | 56 | Wife | — | Virginia |
| 13 | Charlotte Moore | 17 | Daughter | — | Virginia |
| 14 | Lucia M. Moore | 10 | Daughter | — | Virginia |
| 15 | Sonia C. Dinos | 42 | Head | Proprietor | Greece |
| 16 | Nick Dinos | 42 | Brother | Proprietor | Greece |
| 17 | Louis Andropoulos | 23 | Lodger | Cook | Illinois |
| 18 | Bayliss Grimes | 50 | Head | Owner | Virginia |
| 19 | Della C. Grimes | 40 | Wife | — | West Virginia |
| 20 | John B. Hall | 60 | Head | Dealer | Virginia |
| 21 | Ethel H. Hall | 50 | Wife | — | Virginia |
| 22 | Ethel U. Hall | 24 | Daughter | Book-Keeper | Virginia |
| 23 | Margaret B. Young | 58 | Head | Book-Keeper | Pennsylvania |
| 24 | Thomas C. Young | 29 | Son | Pay Master | Pennsylvania |
| 25 | Howard M. Armfield | 30 | Son | General Agent | North Carolina |
| 26 | Sydney Armfield | 34 | Daughter | Asst Cashier | Pennsylvania |
| 27 | O. C. Hoge | 51 | Head | Foreman | West Virginia |
| 28 | Nannie H. Hoge | 50 | Wife | — | West Virginia |
| 29 | William M. Jackson | 41 | Head | Stone Mason | Virginia |
| 30 | Mildred S. Jackson | 34 | Wife | Maid | Virginia |
| 31 | Eva L. Jackson | 18 | Daughter | — | Virginia |
| 32 | James H. Sowers | 69 | Head | Farmer | Virginia |
| 33 | Emily S. Sowers | 70 | Wife | — | Virginia |
| 34 | Linwood Sowers | 40 | Son | Carpenter | Virginia |
| 35 | Thomas Sowers | 35 | Son | Carpenter | Virginia |
| 36 | Andrew Sowers | 25 | Son | Salesman | Virginia |
| 37 | Lena Stewart | 22 | Servant | Maid | Virginia |
| 38 | Irvin L. Bladen | 28 | Head | — | Virginia |
| 39 | Floris Bladen | 28 | Daughter | Maid | Virginia |
| 40 | Dallas O. Fur | 52 | Head | Farmer | Virginia |
Pedigree Summary
Ruth + 3 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)